Python syntax help, output to new Feature Class

My code looks something like this (below).What I need is pretty simple, I just can't figure out the proper syntax. Basically I want to define some dates (def dates)Some plant types (def plants)and some abbreviations for those plant types (def Abvs)and then I want to call those functions (I hope that's the correct term, I'm not a programmer as you can tell) as part of my output names. If I can figure this out, this will save me soooo much time. I would really appreciate any thoughts on what to do here.